Geophysical Research Letters,
Год журнала:
2025,
Номер
52(4)
Опубликована: Фев. 12, 2025
Abstract
Although
vegetation
phenology
generally
alters
productivity,
spatiotemporal
variations
in
this
effect
and
its
potential
drivers
remain
unclear.
We
used
satellite‐based
gross
primary
productivity
(GPP)
data
sets
to
analyze
trends
the
sensitivity
of
spring
GPP
(spring
S
GP
)
autumn
(autumn
).
also
explored
across
northern
middle
high
latitudes
(>30°N)
from
2001
2019.
Our
analysis
revealed
significant
increases
(
P
<
0.05),
with
pronounced
boreal
forests
tundra
biomes.
In
contrast,
significantly
declined
deserts
xeric
shrublands
0.05).
Spring
temperatures
leaf
area
index
(LAI)
were
key
factors
influencing
,
while
LAI
downward
surface
solar
radiation
drove
variation
.
findings
highlight
critical
role
phenology‐productivity
interactions
achieving
carbon
goals
need
for
future
research
on
climate
feedback
mechanisms.
Agricultural Water Management,
Год журнала:
2024,
Номер
292, С. 108673 - 108673
Опубликована: Янв. 13, 2024
Climate
change
directly
affects
crop
yields,
which
would
cause
more
future
food
security
crises.
Ensemble
global
climate
models
(GCMs)
combined
with
growth
are
an
effective
method
to
project
such
impacts.
In
the
current
study,
five
criteria
were
used
pick
out
ten
GCMs.
Three
types
of
efficiency
criteria,
namely
root-mean-squared
error
(RMSE),
Pearson's
correlation
coefficient
(R),
Nash-Sutcliffe
(NSE),
and
bias
(BISA)
between
predicted
observed
temperature
precipitation,
evaluate
select
better-performing
GCMs
for
baseline
period
(1981–2010).
Then,
AquaCrop-GIS,
driven
by
downscaled
projected
data
from
selected
GCMs,
was
predict
rice
yields
in
Nile
River
Delta
(NRD)
region
under
two
Shared
Socioeconomic
Pathways
(SSP)
scenarios
(SSP2–4.5
SSP5–8.5)
four
prediction
periods
(2021–2099).
Four
statistical
indicators,
namely,
(Pe),
normalized
RMSE
(RMSEn),
index
agreement
(Dindex),
determination
(R2),
performance
AquaCrop-GIS.
Our
results
showed
that
including
BCC-CSM2-MR,
CMCC-ESM2,
INM-CM5–0,
MRI-ESM2–0,
UKESM1–0-LL,
had
better
performances
simulating
precipitation
(0.81
≤
4.77,
0.30
NSE
0.97,
0.57
R
0.99).
addition,
AquaCrop-GIS
excellent
accuracy
that,
without
CO2
effects,
increase
2.19%
4.23%
SSP2–4.5
0.72%
0.30%
SSP5–8.5
during
2030s
2050s,
respectively.
However,
2070s
2090s,
decline
7.20%
9.0%
23.34%
34.24%
With
rise
14.49%,
24.97%,
15.96%,
16.93%
14.33%,
26.22%,
8.06%,
1.61%
2030s,
2070s,
Regardless
uncertainties
limitations,
our
findings
beneficial
farmers
policymakers
develop
appropriate
management
strategies
improve
Egypt.
Nanotechnology Reviews,
Год журнала:
2024,
Номер
13(1)
Опубликована: Янв. 1, 2024
Abstract
Slope
protection
and
erosion
management
are
severely
hampered
by
the
rapid
infrastructure
development
in
mountainous
valleys,
especially
during
monsoon
season.
While
conventional
approaches
like
vegetation,
porous
concrete,
inorganic
procedures
have
been
used,
stronger
more
ecologically
friendly
alternatives
still
needed.
A
new
kind
of
concrete
called
vegetation
(VC)
allows
roots
to
grow
through
frame
combining
plant
integration
with
concrete.
This
creative
method
might
be
used
for
environmentally
building
planting.
The
alkalinity
VC
significantly
impacts
its
planting
capabilities
soil
nutrient
levels,
making
it
crucial
reduce
alkalinity.
In
this
study,
silica
fume
(SF)
fly
ash
(FA)
were
combined
create
low-alkaline
VC.
effects
SF
FA
on
VC’s
alkalinity,
porosity,
compressive
strength,
characteristics
examined.
study
also
investigated
influence
fertility
impact
nutrients.
Test
results
revealed
that
reduced
pH
reducing
calcium
hydroxide
(CH)
crystals.
had
a
lower
basicity
coefficient
(
M
)
than
FA,
significant
effect
lowering
strength
decreased
but
increased
SF,
despite
having
smaller
cement
component
VC–SF
mixes.
suggests
blending
is
feasible,
dosage
exceeding
strength.
Lowering
nutrients,
including
hydrolyzable
nitrogen
(AH-N),
extractable
phosphorus
(P),
potassium
(K).
It
improved
properties
root
development,
stem
height,
leaf
relative
water
content.
Using
stabilization
did
not
instead
available
alkali-hydrolyzable
32.81
52.92%,
respectively.
findings
open
up
avenues
investigation
into
technology
important
ramifications
use
technology,
particularly
Indian
contexts.
Frontiers in Environmental Science,
Год журнала:
2025,
Номер
12
Опубликована: Янв. 13, 2025
The
Qilian
Mountains
and
Huangshui
River
Basin
(HRB)
represent
significant
ecological
functional
areas
carbon
reservoirs
within
China.
estimation
prediction
of
vegetation
net
primary
productivity
(NPP)
in
this
area
is
beneficial
for
the
management
China’s
terrestrial
ecosystems.
Nevertheless,
existing
methods
NPP
at
local
scale
are
characterised
by
considerable
uncertainty
error,
have
not
accounted
influence
multi-factor
interactions.
Accordingly,
study
initially
sought
to
quantify
data
HRB
from
2000
2019
through
implementation
an
improved
Carnegie-Ames-Stanford
Approach
(CASA)
model.
Subsequently,
it
endeavoured
elucidate
spatiotemporal
evolution
patterns
influencing
factors
over
years.
ConvGRU
model
was
employed
investigate
prospective
trajectory
HRB.
findings
revealed
a
notable
upward
annual
variation
between
2019.
majority
regions
demonstrated
increase
NPP,
although
few
exhibited
decline.
Furthermore,
correlation
PRE,
TEMP,
SR,
NDVI
exhibits
regional
disparities.
spatial
characteristics
future
also
demonstrate
overall
increasing
trend.
Additionally,
distribution
characteristics,
with
evident
trends
hot
spot
contraction
or
cold
expansion.
This
provides
pivotal
theoretical
support
assessment
sequestration
status
analogous
regions.
Abstract
Spring
vegetation
phenology
(green‐up
onset
date,
GUD)
exhibits
notable
sensitivity
to
climate
change,
serving
as
a
critical
indicator
of
ecosystem
dynamics.
However,
long‐term
changes
and
drivers
GUD
remain
unclear.
Here
we
showed
that
satellite‐derived
averaged
over
China
forests
grasslands
advanced
by
−1.3
±
0.4
(mean
SD)
days
decade
−1
during
1982–2022,
but
with
contrasting
trends
between
(−5.0
0.6
)
(2.8
),
despite
similarly
increasing
temperature
precipitation.
Such
were
caused
different
responses
higher
preseason
mean
more
total
Moreover,
sensitivities
precipitation
patterns
respect
spatial
gradient
background
conditions
grasslands.
Our
study
elucidates
mechanisms
behind
responding
which
could
help
optimize
land‐management
strategies
anticipate
distribution
under
change.
Land Degradation and Development,
Год журнала:
2024,
Номер
35(10), С. 3461 - 3476
Опубликована: Апрель 25, 2024
Abstract
Rocky
desertification
is
a
prominent
ecological
issue
in
Southwest
China's
karst
region,
ranking
among
the
nation's
three
primary
challenges
alongside
soil
erosion
and
desertification.
The
government
initiated
Desertification
Treatment
Program
2008,
lacking
comprehensive
evaluation
of
its
benefits.
This
study
evaluates
program's
impact
on
ecosystem
services
over
last
two
decades
using
remote
sensing,
models,
field
data.
results
indicated
continuous
net
decrease
rocky
desertification,
48%
eight
southwestern
provinces
from
2005
to
2021.
average
annual
growth
rate
vegetation
cover
reached
2.54%
key
counties
for
control,
significantly
higher
than
that
all
451
2016
2020.
Additionally,
productivity
increased
by
35.8%
2000
2020,
which
1.34
times
greater
observed
non‐rocky
counties.
It
was
found
service
promotion
after
reduction
area
2010–2020
more
significant,
especially
carbon
sequestration
control
2.7
2000–2010.
indicates
treatment
enters
stage
basis
achieving
rapid
“greening,”
leading
significant
improvements
structures
region
China.
To
mitigate
risk
tailored
measures
must
be
implemented
considering
local
climate,
lithology,
landform
types,
human–land
relations
effective
zoning
classification.
Plants,
Год журнала:
2024,
Номер
13(3), С. 399 - 399
Опубликована: Янв. 29, 2024
Droughts
have
become
more
severe
and
frequent
due
to
global
warming.
In
this
context,
it
is
widely
accepted
that
for
drought
assessments,
both
water
supply
(rainfall)
demand
(standardized
precipitation
evapotranspiration
index,
SPEI)
should
be
considered.
Using
SPEI,
we
explored
the
spatial-temporal
patterns
of
dry
wet
annual
seasonal
changes
in
five
sub-regions
East
Asia
during
1902-2018.
These
factors
are
linked
excess
frequency
severity
on
regional
scale,
their
effect
vegetation
remains
an
important
topic
climate
change
studies.
Our
results
show
SPEI
significantly
improved
extreme
mostly
affected
SPEI-06
SPEI-12
growing
seasons
1981-2018.
The
trends
affect
Asia.
had
two
extremely
spells
1936-1947
1978-2018.
Japan,
South
Korea,
North
Korea
summer
compared
other
regions
Asia,
with
occurring
at
51.4%,
respectively.
mean
frequencies
China
Mongolia
57.4%
54.6%.
driest
high
duration.
spatial
analysis
solar
radiation
(SR),
vapor
pressure
(WVP),
wind
speed
(WS),
condition
index
(VCI),
temperature
(TCI),
health
(VHI)
confirmed
region
suffered
from
maximum
events.
variation
shows
no
clear
drying
autumn
seasons.
During
winter
spring
seasons,
there
was
a
trend
region.
1902-1990,
presented
diverse
characteristics,
Mongolia,
four
different
Korea.
1991-2018,
while
showed
spring,
autumn,
This
ecological
climatic
mechanism
provides
good
basis
assessment
drought-change
variations
within
An
understandings
long-term
effects
rainfall
droughts
varying
essential
resource
management
adaptation.
Based
results,
resources
will
increase
under
warming,
which
may
alleviate
scarcity
issue
